Holley E85 Checker - FOR E85 FUEL ONLY NZHC008A a spacer is included to

a spacer is included to fit BB Chevy

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1966-1985 Ford LTD

commonly used for exiting two 3-1/2" diameter exhaust pipes

From new product design

Holley E85 Checker - FOR E85 FUEL ONLY NZHC008A a spacer is included toCalibrating the right air fuel mixture is important to gain proper power and efficiency from your carburetor and engine. But for vehicles running E85 fuel, proper calibration is difficult if you don't know the exact percentage of ethanol to gasoline in the fuel. Because E85 fuel can vary in the amount of ethanol and gasoline mixture, Holley's E85 Checker is an essential tool that can instantly determine the ratio in the E85 fuel you're using. Holley's